[toc] 题目链接 "Minimum Depth of Binary Tree LeetCode" 注意点 不要访问空结点 解法 解法一:递归,DFS。首先判空,若当前结点不存在,直接返回0。然后看若左子结点不存在,那么对右子结点调用递归函数,并加1返回。反之,若右子结点不存在
publicintminDepth(TreeNode root) {if(root ==null)return0;intdepth =1;//The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node.LinkedList<TreeNode> queue =newLinkedList<TreeNode>(); queue.add(root);intcurnum =1;intnextnum =0...
Can you solve this real interview question? Minimum Depth of Binary Tree - Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. Note: A leaf is a
111. Minimum Depth of Binary Tree 111. Minimum Depth of Binary Tree 方法1: recursion 方法2: dfs,iterative(preorder) Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the roo......
LeetCode 111 题,Minimum Depth of Binary Tree 解题思路 1、读题,求解二叉树的最小Depth。 2、用bfs 去解决,队列带上每层的层数。当有一个节点的左右子树都为空时,返回当前层数,就找到解。 Python 代码 # De…
https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/submissions/给定一个二叉树,找出其最小深度。最小深度是从根节点到最近叶子节点的最短路径上的节点数量。说明: 叶子节点是指没有子节点的节点。示例:给定二叉树 [3,9,20,null,null,15,7],...
Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 本题思路: 1. 每进入一层用一个变量(这里是levelNum)记录当前从根节点到这一层节点的节点数 ...
【Leetcode】Minimum Depth of Binary Tree 题目链接:https://leetcode.com/problems/minimum-depth-of-binary-tree/ 题目: Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node....
leetcode dfs Minimum Depth of Binary Tree Minimum Depth of Binary Tree Total Accepted: 25609 Total Submissions: 86491My Submissions Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node....
Can you solve this real interview question? Second Minimum Node In a Binary Tree - Given a non-empty special binary tree consisting of nodes with the non-negative value, where each node in this tree has exactly two or zero sub-node. If the node has two s